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Search options questions only not deleted user 11277

Questions on gathering, grouping or clustering data based on certain criteria. This is to be used with primary tags such as list-manipulation, string-manipulation or similar tags, with the primary tag indicating the specific use case.

8 votes
3 answers
707 views

GroupBy a list of associations with their keys

How can I go from as = { <|A->{1,11},B->{1,12},C->{1,13}|>, <|A->{2,21},B->{2,22},C->{2,23}|>, <|A->{3,31},B->{3,32},C->{3,33}|> } to <| "A" -> {{1, 11}, {2, 21}, {3, 31}}, …
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